Note 8 - Employee Benefit Plans - Net Periodic Pension Costs and Related Components (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Interest cost	$ 130	$ 87	$ 390	$ 261
Service cost	83	100	249	300
Recognized net actuarial loss	3	69	9	207
Net periodic pension cost	$ 216	$ 256	$ 648	$ 768